Drop down menu expantion

I have an auction site and i have a very small task, my drop down menu expands hirozontally and users need to scoll down to see the entire list of categories.

I would like for the drop down menu to expand just like the drop down menu on ebay.(it expands in a horizonal and vertical fashion giving access to categories without making the user scroll all the way down to see all categories)

Sir,
I am very interested about to do your job.
I am a professional web programmer on PHP, MySQL, SQL, AJAX, Joomla, phpBB3, Javascript, DHTML, CSS, XML.
I am also an expert on Magento Shopping Cart, Zen ShoppingDaha fazlası